Air thermoscope: Sanctorius' (1651-1636) clinical thermometer (1612). One which was globe shaped was place in patient's mouth and the other in a bow of water. The serpentine thermometer was graduated with glass beads. Woodcut

The Galileo thermometers are based on Galileo's theories about how the universe worked. He discovered that liquid experiences density changes as the temperature changes. You can see this principle by watching Galileo thermometers, because you will...

The Galileo thermometers are based on Galileo's theories about how the universe worked. He discovered that liquid experiences density changes as the temperature changes. You can see this principle by watching Galileo thermometers, because you will...

The Galileo thermometers are based on Galileo's theories about how the universe worked. He discovered that liquid experiences density changes as the temperature changes. You can see this principle by watching Galileo thermometers, because you will...

Rene-Antoine Ferchault de Reamur (1683-1757) French physicist. He is shown constructing a thermometer using spirit instead of mercury, and his thermometer had 80 degrees from freezing to boiling point. From Vies des Savants Illustres du XVIIIe Siecle...